Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b58c2b2337866dc…

MALICIOUS

PDF

46.6 KB Created: 2020-08-06 06:42:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 73e5e0c27cf7f9c377299904454eb4f2 SHA-1: a3df3942177382f06881eeed57a40656c7e66e60 SHA-256: 2b58c2b2337866dce900a5c9f89178c07f936f59724910f9ed5c82c9f6cb3fa3
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a mass external link farm, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.cc/wb?keyword=pulmonary%20hypertension%20neonatal%20pdf', which is likely intended to trick the user into clicking it. The presence of numerous other PDF links, many hosted on Shopify, suggests a SEO-based lure to disguise malicious activity.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/wb?keyword=pulmonary%20hypertension%20neonatal%20pdf
    • http://files.mysteifflife.com/uploads/1/3/1/4/131452887/kodazoxevego.pdf
    • http://files.briggsquarterhorses.com/uploads/1/3/1/4/131409127/5858127.pdf
    • http://files.solutionktech.net/uploads/1/3/1/6/131606331/6396622.pdf
    • http://files.fullcirclesynthetics.com/uploads/1/3/1/4/131453213/xasubaloli.pdf
    • https://cdn.shopify.com/s/files/1/0434/4945/0663/files/kavufesoxirifigugax.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/dititex.pdf
    • https://cdn.shopify.com/s/files/1/0431/5804/4826/files/45524522577.pdf
    • https://cdn.shopify.com/s/files/1/0434/5180/9957/files/aprender_a_leer_las_cartas.pdf
    • https://cdn.shopify.com/s/files/1/0439/6272/8606/files/48253058110.pdf
    • https://cdn.shopify.com/s/files/1/0437/0235/4070/files/kelaxo.pdf
    • https://cdn.shopify.com/s/files/1/0434/1907/4712/files/nintendo_switch_reset.pdf
    • https://cdn.shopify.com/s/files/1/0427/8131/1132/files/zozixarojamux.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/jewisamazumifarufemosaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/8526/7097/files/3289617970.pdf
    • https://cdn.shopify.com/s/files/1/0428/1411/1903/files/8542937040.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000770c.bin
34c69ab9aba0208a619c0125ee4399fa5c7bfda5aa83b07ba5f86c4fa689e059		 pdf-font-stream PDF embedded font (sfnt) at offset 0x770C 5384 bytes
font_01_sfnt_off0000892f.bin
d48a7490abece117bf96b9060b532b3d2749f8bd36c5964c94e77762796f24ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x892F 10864 bytes

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